Sony has confirmed that shortages of PlayStation 3 are looming in the U.S. and U.K., saying demand for PS3 Slim beat its expectations.  As reported in MCV UK, Sony first indicated over this past weekend that it was preparing for tight inventory for the coming months in the U.S.  The company now says the same goes for the UK market.  Sony’s Mark Howsen told MCV that there are inventory issues based on overwhelming demand since the launch of the PS3 Slim, which he said was running 20 percent ahead of expectations.  He added that the PS3 Slim 120GB model is particularly affected.  MCV surmises that whatever issues Sony is having, PS3 systems are sure to be plentiful as high-profile first quarter titles such as God of War III and Heavy Rain hit shelves in the coming weeks.  Read more at MCV UK.